package com.shc.community.service;

import com.shc.community.dao.LoginTicketMapper;
import com.shc.community.dao.UserMapper;
import com.shc.community.entity.ActivationConstant;
import com.shc.community.entity.LoginTicket;
import com.shc.community.entity.User;
import com.shc.community.utils.CommunityUtil;
import com.shc.community.utils.CookieUtil;
import com.shc.community.utils.MailClient;
import com.shc.community.utils.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;

@Service
public class UserService {

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private MailClient mailClient;

//    @Autowired
//    private LoginTicketMapper loginTicketMapper;

    @Autowired
    private TemplateEngine templateEngine;
    @Autowired
    private RedisTemplate redisTemplate;

    @Value("${community.path.domain}")
    private String domain;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    public User findUserById(int id){
//        return userMapper.findById(id);
        User user = getCache(id);
        if (user == null){
             user = initCache(id);
        }
        return user;
    }

    public Map<String, Object> register(User user){
        Map<String, Object> map = new HashMap<>();
        if (user == null){
            throw new IllegalArgumentException("参数不能为空！");
        }
        if (StringUtils.isBlank(user.getUsername())){
            map.put("usernameMsg","账号不能为空！");
            return map;
        }
        if (StringUtils.isBlank(user.getPassword())){
            map.put("passwordMsg","密码不能为空！");
            return map;
        }
        if (StringUtils.isBlank(user.getEmail())){
            map.put("emailMsg","邮箱不能为空！");
            return map;
        }
        //验证账号
        User u = userMapper.fingByName(user.getUsername());
        if (u != null){
            map.put("usernameMsg","该账号已存在！");
            return map;
        }
        u = userMapper.findByEmail(user.getEmail());
        if (u != null){
            map.put("emailMsg","该邮箱已被注册！");
            return map;
        }
        //注册用户
        user.setSalt(CommunityUtil.generateUUID().substring(0, 5));
        user.setPassword(CommunityUtil.md5(user.getPassword() + user.getSalt()));
        user.setType(0);
        user.setStatus(0);
        user.setActivationCode(CommunityUtil.generateUUID());
        user.setHeaderUrl(String.format("http://images.nowcoder.com/head/%dt.png", new Random().nextInt(1000)));
        user.setCreateTime(new Date());
        userMapper.addUser(user);
        // 激活邮件
        Context context = new Context();
        context.setVariable("email", user.getEmail());
        // http://localhost:8080/community/activation/101/code
        String url = domain + contextPath + "/activation/" + user.getId() + "/" + user.getActivationCode();
        context.setVariable("url", url);
        String content = templateEngine.process("/mail/activation", context);
        mailClient.sendMail(user.getEmail(), "激活账号", content);
        return map;
    }

    public int activation(int userId , String code){
        User user = userMapper.findById(userId);
        ActivationConstant constant = new ActivationConstant();
        if (user.getStatus() == 1){
            return constant.getACTIVATION_REPEAT();
        }else if(user.getActivationCode().equals(code)){
            userMapper.updateStatus(userId,1);
            clearCache(userId);
            return constant.getACTIVATION_SUCCESS();
        }else {
            return constant.getACTIVATION_FAIL();
        }
    }

    public Map<String , Object> login(String username , String password , int expiredSeconds){
        Map<String , Object> map = new HashMap<>();
        //验证是否空值
        if (username == null){
            map.put("usernameMsg","账号不能为空！");
            return map;
        }
        if (password == null){
            map.put("passwordMsg","密码不能为空！");
            return map;
        }
        //验证账号
        User user = userMapper.fingByName(username);
        if (user == null){
            map.put("usernameMsg","账号不正确！");
            return map;
        }
        //验证状态
        if (user.getStatus() == 0 ){
            map.put("statusMsg","账号未激活！");
            return map;
        }
        //验证密码
        password = CommunityUtil.md5(password + user.getSalt());
        if (!user.getPassword().equals(password)){
            map.put("passwordMsg","密码不正确！");
            return map;
        }
        // 生成登录凭证
        LoginTicket loginTicket = new LoginTicket();
        loginTicket.setUserId(user.getId());
        loginTicket.setTicket(CommunityUtil.generateUUID());
        loginTicket.setStatus(0);
        loginTicket.setExpired(new Date(System.currentTimeMillis()+ expiredSeconds  * 1000));
//        loginTicketMapper.addLoginTicket(loginTicket);
        String redisKey = RedisKeyUtil.getTicketKey(loginTicket.getTicket());
        redisTemplate.opsForValue().set(redisKey,loginTicket);
        map.put("ticket" , loginTicket.getTicket());
        return map;
    }
    //退出登录
    public void logout(String ticket){
//        loginTicketMapper.updateStatus(ticket,1);
        String redisKey = RedisKeyUtil.getTicketKey(ticket);
        LoginTicket loginTicket = (LoginTicket) redisTemplate.opsForValue().get(redisKey);
        loginTicket.setStatus(1);
        redisTemplate.opsForValue().set(redisKey,loginTicket);
    }
    //查询登录凭证
    public LoginTicket findLoginTicket(String ticket){
//       return loginTicketMapper.findByTicket(ticket);
        String redisKey = RedisKeyUtil.getTicketKey(ticket);
        return (LoginTicket) redisTemplate.opsForValue().get(redisKey);
    }
    //上传用户头像
    public int updateHeader(int userId , String headerUrl){
//        return userMapper.updateHeader(userId, headerUrl);
        int rows = userMapper.updateHeader(userId, headerUrl);
        clearCache(userId);
        return rows;
    }

    //修改用户密码
    public void updatePassword(int userId , String password){
        User user = userMapper.findById(userId);
        password = CommunityUtil.md5(password + user.getSalt());
        userMapper.updatePassword(userId, password);
        clearCache(userId);
    }

    public User findUserByName(String username){
        return userMapper.fingByName(username);
    }

    //优先从缓存中取值
    public User getCache(int userId){
        String redisKey = RedisKeyUtil.getUserKey(userId);
        return (User) redisTemplate.opsForValue().get(redisKey);
    }
    //取不到值时初始化缓存数据
    public User initCache(int userId){
        User user = userMapper.findById(userId);
        String redisKey = RedisKeyUtil.getUserKey(userId);
        redisTemplate.opsForValue().set(redisKey,user,3600,TimeUnit.SECONDS);
        return user;
    }
    //数据变更时清除缓存数据
    public void clearCache(int userId){
        String redisKey = RedisKeyUtil.getUserKey(userId);
        redisTemplate.delete(redisKey);
    }
}
